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<li class="navelem"><a class="el" href="../../dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="../../dir_59f6ff4002ccd198a41912854fe6ea3b.html">cefQT</a></li>  </ul>
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  <div class="headertitle"><div class="title">cef_atomicops_x86_gcc.h</div></div>
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<a href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html">浏览该文件的文档.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">// Copyright (c) 2011 Google Inc. All rights reserved.</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">//</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">// Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment">// modification, are permitted provided that the following conditions are</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment">// met:</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment">//</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">//    * Redistributions of source code must retain the above copyright</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment">// notice, this list of conditions and the following disclaimer.</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment">//    * Redistributions in binary form must reproduce the above</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">// copyright notice, this list of conditions and the following disclaimer</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment">// in the documentation and/or other materials provided with the</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">// distribution.</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment">//    * Neither the name of Google Inc. nor the name Chromium Embedded</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">// Framework nor the names of its contributors may be used to endorse</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">// or promote products derived from this software without specific prior</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment">// written permission.</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment">//</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment">// &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment">// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment">// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment">// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment">// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment">// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="comment">// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="comment">// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="comment">// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="comment">// Do not include this header file directly. Use base/cef_atomicops.h</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="comment">// instead.</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span> <span class="comment">// 1. 修改 cmake\cef_variables.cmake 文件，注释掉 if(OS_WINDOWS)  endif() 语句块中的所有行</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="preprocessor">#ifndef CEF_INCLUDE_BASE_INTERNAL_CEF_ATOMICOPS_X86_GCC_H_</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="preprocessor">#define CEF_INCLUDE_BASE_INTERNAL_CEF_ATOMICOPS_X86_GCC_H_</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span> </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment">// This struct is not part of the public API of this module; clients may not</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment">// use it.</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="comment">// Features of this x86.  Values may not be correct before main() is run,</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="comment">// but are set conservatively.</span></div>
<div class="foldopen" id="foldopen00041" data-start="{" data-end="};">
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"><a class="line" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html">   41</a></span><span class="keyword">struct </span><a class="code hl_struct" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html">AtomicOps_x86CPUFeatureStruct</a> {</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"><a class="line" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">   42</a></span>  <span class="keywordtype">bool</span> <a class="code hl_variable" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">has_amd_lock_mb_bug</a>; <span class="comment">// Processor has AMD memory-barrier bug; do lfence</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>                            <span class="comment">// after acquire compare-and-swap.</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>};</div>
</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="keyword">extern</span> <span class="keyword">struct </span><a class="code hl_struct" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html">AtomicOps_x86CPUFeatureStruct</a></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    <a class="code hl_variable" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#a8da6dd36e5712f8e1f1afd513fb11f3c">AtomicOps_Internalx86CPUFeatures</a>;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"><a class="line" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#aa3b12a493a95aee6ca06745c0c477145">   48</a></span><span class="preprocessor">#define ATOMICOPS_COMPILER_BARRIER() __asm__ __volatile__(&quot;&quot; : : : &quot;memory&quot;)</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span> </div>
<div class="foldopen" id="foldopen00050" data-start="{" data-end="}">
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"><a class="line" href="../../d2/dc5/namespacebase.html">   50</a></span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d2/dc5/namespacebase.html">base</a> {</div>
<div class="foldopen" id="foldopen00051" data-start="{" data-end="}">
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html">   51</a></span><span class="keyword">namespace </span>subtle {</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="comment">// 32-bit low-level operations on any platform.</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span> </div>
<div class="foldopen" id="foldopen00055" data-start="{" data-end="}">
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">   55</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">NoBarrier_CompareAndSwap</a>(<span class="keyword">volatile</span> Atomic32* ptr,</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>                                         Atomic32 old_value,</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>                                         Atomic32 new_value) {</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>  Atomic32 prev;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>  __asm__ __volatile__(<span class="stringliteral">&quot;lock; cmpxchgl %1,%2&quot;</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>                       : <span class="stringliteral">&quot;=a&quot;</span> (prev)</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>                       : <span class="stringliteral">&quot;q&quot;</span> (new_value), <span class="stringliteral">&quot;m&quot;</span> (*ptr), <span class="stringliteral">&quot;0&quot;</span> (old_value)</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>                       : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>  <span class="keywordflow">return</span> prev;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>}</div>
</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span> </div>
<div class="foldopen" id="foldopen00066" data-start="{" data-end="}">
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a6defad5b43e489dd731ce1218caf064c">   66</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a6defad5b43e489dd731ce1218caf064c">NoBarrier_AtomicExchange</a>(<span class="keyword">volatile</span> Atomic32* ptr,</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>                                         Atomic32 new_value) {</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>  __asm__ __volatile__(<span class="stringliteral">&quot;xchgl %1,%0&quot;</span>  <span class="comment">// The lock prefix is implicit for xchg.</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>                       : <span class="stringliteral">&quot;=r&quot;</span> (new_value)</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>                       : <span class="stringliteral">&quot;m&quot;</span> (*ptr), <span class="stringliteral">&quot;0&quot;</span> (new_value)</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>                       : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>  <span class="keywordflow">return</span> new_value;  <span class="comment">// Now it&#39;s the previous value.</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>}</div>
</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span> </div>
<div class="foldopen" id="foldopen00075" data-start="{" data-end="}">
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#aaf2dc7b463ca56cda3091037c3d68871">   75</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#aaf2dc7b463ca56cda3091037c3d68871">NoBarrier_AtomicIncrement</a>(<span class="keyword">volatile</span> Atomic32* ptr,</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>                                          Atomic32 increment) {</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>  Atomic32 temp = increment;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>  __asm__ __volatile__(<span class="stringliteral">&quot;lock; xaddl %0,%1&quot;</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>                       : <span class="stringliteral">&quot;+r&quot;</span> (temp), <span class="stringliteral">&quot;+m&quot;</span> (*ptr)</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>                       : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>  <span class="comment">// temp now holds the old value of *ptr</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>  <span class="keywordflow">return</span> temp + increment;</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>}</div>
</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span> </div>
<div class="foldopen" id="foldopen00085" data-start="{" data-end="}">
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a25f53fcd33acbae594f54a653679f676">   85</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a25f53fcd33acbae594f54a653679f676">Barrier_AtomicIncrement</a>(<span class="keyword">volatile</span> Atomic32* ptr,</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>                                        Atomic32 increment) {</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>  Atomic32 temp = increment;</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>  __asm__ __volatile__(<span class="stringliteral">&quot;lock; xaddl %0,%1&quot;</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>                       : <span class="stringliteral">&quot;+r&quot;</span> (temp), <span class="stringliteral">&quot;+m&quot;</span> (*ptr)</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>                       : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>  <span class="comment">// temp now holds the old value of *ptr</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#a8da6dd36e5712f8e1f1afd513fb11f3c">AtomicOps_Internalx86CPUFeatures</a>.<a class="code hl_variable" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">has_amd_lock_mb_bug</a>) {</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>    __asm__ __volatile__(<span class="stringliteral">&quot;lfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>  }</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>  <span class="keywordflow">return</span> temp + increment;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>}</div>
</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span> </div>
<div class="foldopen" id="foldopen00098" data-start="{" data-end="}">
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a4cfa97b39c0c5690fcd1f646f035de3f">   98</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a4cfa97b39c0c5690fcd1f646f035de3f">Acquire_CompareAndSwap</a>(<span class="keyword">volatile</span> Atomic32* ptr,</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>                                       Atomic32 old_value,</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>                                       Atomic32 new_value) {</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>  Atomic32 x = <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">NoBarrier_CompareAndSwap</a>(ptr, old_value, new_value);</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#a8da6dd36e5712f8e1f1afd513fb11f3c">AtomicOps_Internalx86CPUFeatures</a>.<a class="code hl_variable" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">has_amd_lock_mb_bug</a>) {</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>    __asm__ __volatile__(<span class="stringliteral">&quot;lfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>  }</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  <span class="keywordflow">return</span> x;</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>}</div>
</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span> </div>
<div class="foldopen" id="foldopen00108" data-start="{" data-end="}">
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#ac09549f056f12b8d8528928f15b01e2d">  108</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#ac09549f056f12b8d8528928f15b01e2d">Release_CompareAndSwap</a>(<span class="keyword">volatile</span> Atomic32* ptr,</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>                                       Atomic32 old_value,</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>                                       Atomic32 new_value) {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">NoBarrier_CompareAndSwap</a>(ptr, old_value, new_value);</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>}</div>
</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span> </div>
<div class="foldopen" id="foldopen00114" data-start="{" data-end="}">
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a858cf021e800f3fc91408f3378247138">  114</a></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a858cf021e800f3fc91408f3378247138">NoBarrier_Store</a>(<span class="keyword">volatile</span> Atomic32* ptr, Atomic32 value) {</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>  *ptr = value;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>}</div>
</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span> </div>
<div class="foldopen" id="foldopen00118" data-start="{" data-end="}">
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">  118</a></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">MemoryBarrier</a>() {</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>  __asm__ __volatile__(<span class="stringliteral">&quot;mfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>}</div>
</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span> </div>
<div class="foldopen" id="foldopen00122" data-start="{" data-end="}">
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#ad160cbf5276199e83e430596a2cda70a">  122</a></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#ad160cbf5276199e83e430596a2cda70a">Acquire_Store</a>(<span class="keyword">volatile</span> Atomic32* ptr, Atomic32 value) {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>  *ptr = value;</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">MemoryBarrier</a>();</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>}</div>
</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span> </div>
<div class="foldopen" id="foldopen00127" data-start="{" data-end="}">
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a10d52b3886a1b46cebf58355162f0a48">  127</a></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a10d52b3886a1b46cebf58355162f0a48">Release_Store</a>(<span class="keyword">volatile</span> Atomic32* ptr, Atomic32 value) {</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>  <a class="code hl_define" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#aa3b12a493a95aee6ca06745c0c477145">ATOMICOPS_COMPILER_BARRIER</a>();</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>  *ptr = value; <span class="comment">// An x86 store acts as a release barrier.</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>  <span class="comment">// See comments in Atomic64 version of Release_Store(), below.</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>}</div>
</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span> </div>
<div class="foldopen" id="foldopen00133" data-start="{" data-end="}">
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a7d6c7a9cd36a3510088437fb28e998b8">  133</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a7d6c7a9cd36a3510088437fb28e998b8">NoBarrier_Load</a>(<span class="keyword">volatile</span> <span class="keyword">const</span> Atomic32* ptr) {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>  <span class="keywordflow">return</span> *ptr;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>}</div>
</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span> </div>
<div class="foldopen" id="foldopen00137" data-start="{" data-end="}">
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#aa99064d25f3a571f757e33bd9e8214e5">  137</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#aa99064d25f3a571f757e33bd9e8214e5">Acquire_Load</a>(<span class="keyword">volatile</span> <span class="keyword">const</span> Atomic32* ptr) {</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>  Atomic32 value = *ptr; <span class="comment">// An x86 load acts as a acquire barrier.</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>  <span class="comment">// See comments in Atomic64 version of Release_Store(), below.</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>  <a class="code hl_define" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#aa3b12a493a95aee6ca06745c0c477145">ATOMICOPS_COMPILER_BARRIER</a>();</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>  <span class="keywordflow">return</span> value;</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>}</div>
</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span> </div>
<div class="foldopen" id="foldopen00144" data-start="{" data-end="}">
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"><a class="line" href="../../dc/d42/namespacebase_1_1subtle.html#a0533289c3b0c65213bddb82211634aa9">  144</a></span><span class="keyword">inline</span> Atomic32 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a0533289c3b0c65213bddb82211634aa9">Release_Load</a>(<span class="keyword">volatile</span> <span class="keyword">const</span> Atomic32* ptr) {</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>  <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">MemoryBarrier</a>();</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>  <span class="keywordflow">return</span> *ptr;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>}</div>
</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span> </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span><span class="preprocessor">#if defined(__x86_64__)</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span> </div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span><span class="comment">// 64-bit low-level operations on 64-bit platform.</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span> </div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">NoBarrier_CompareAndSwap</a>(<span class="keyword">volatile</span> Atomic64* ptr,</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>                                         Atomic64 old_value,</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>                                         Atomic64 new_value) {</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>  Atomic64 prev;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>  __asm__ __volatile__(<span class="stringliteral">&quot;lock; cmpxchgq %1,%2&quot;</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>                       : <span class="stringliteral">&quot;=a&quot;</span> (prev)</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>                       : <span class="stringliteral">&quot;q&quot;</span> (new_value), <span class="stringliteral">&quot;m&quot;</span> (*ptr), <span class="stringliteral">&quot;0&quot;</span> (old_value)</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>                       : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>  <span class="keywordflow">return</span> prev;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>}</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a6defad5b43e489dd731ce1218caf064c">NoBarrier_AtomicExchange</a>(<span class="keyword">volatile</span> Atomic64* ptr,</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>                                         Atomic64 new_value) {</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>  __asm__ __volatile__(<span class="stringliteral">&quot;xchgq %1,%0&quot;</span>  <span class="comment">// The lock prefix is implicit for xchg.</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>                       : <span class="stringliteral">&quot;=r&quot;</span> (new_value)</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>                       : <span class="stringliteral">&quot;m&quot;</span> (*ptr), <span class="stringliteral">&quot;0&quot;</span> (new_value)</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>                       : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>  <span class="keywordflow">return</span> new_value;  <span class="comment">// Now it&#39;s the previous value.</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>}</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span> </div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#aaf2dc7b463ca56cda3091037c3d68871">NoBarrier_AtomicIncrement</a>(<span class="keyword">volatile</span> Atomic64* ptr,</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>                                          Atomic64 increment) {</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>  Atomic64 temp = increment;</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>  __asm__ __volatile__(<span class="stringliteral">&quot;lock; xaddq %0,%1&quot;</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>                       : <span class="stringliteral">&quot;+r&quot;</span> (temp), <span class="stringliteral">&quot;+m&quot;</span> (*ptr)</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>                       : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>  <span class="comment">// temp now contains the previous value of *ptr</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>  <span class="keywordflow">return</span> temp + increment;</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>}</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span> </div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a25f53fcd33acbae594f54a653679f676">Barrier_AtomicIncrement</a>(<span class="keyword">volatile</span> Atomic64* ptr,</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>                                        Atomic64 increment) {</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>  Atomic64 temp = increment;</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>  __asm__ __volatile__(<span class="stringliteral">&quot;lock; xaddq %0,%1&quot;</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>                       : <span class="stringliteral">&quot;+r&quot;</span> (temp), <span class="stringliteral">&quot;+m&quot;</span> (*ptr)</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>                       : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span>  <span class="comment">// temp now contains the previous value of *ptr</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#a8da6dd36e5712f8e1f1afd513fb11f3c">AtomicOps_Internalx86CPUFeatures</a>.<a class="code hl_variable" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">has_amd_lock_mb_bug</a>) {</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>    __asm__ __volatile__(<span class="stringliteral">&quot;lfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>  }</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>  <span class="keywordflow">return</span> temp + increment;</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>}</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a858cf021e800f3fc91408f3378247138">NoBarrier_Store</a>(<span class="keyword">volatile</span> Atomic64* ptr, Atomic64 value) {</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>  *ptr = value;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>}</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span> </div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#ad160cbf5276199e83e430596a2cda70a">Acquire_Store</a>(<span class="keyword">volatile</span> Atomic64* ptr, Atomic64 value) {</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>  *ptr = value;</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>  <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">MemoryBarrier</a>();</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>}</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span> </div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a10d52b3886a1b46cebf58355162f0a48">Release_Store</a>(<span class="keyword">volatile</span> Atomic64* ptr, Atomic64 value) {</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>  <a class="code hl_define" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#aa3b12a493a95aee6ca06745c0c477145">ATOMICOPS_COMPILER_BARRIER</a>();</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span> </div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>  *ptr = value; <span class="comment">// An x86 store acts as a release barrier</span></div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>                <span class="comment">// for current AMD/Intel chips as of Jan 2008.</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>                <span class="comment">// See also Acquire_Load(), below.</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span> </div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>  <span class="comment">// When new chips come out, check:</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>  <span class="comment">//  IA-32 Intel Architecture Software Developer&#39;s Manual, Volume 3:</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>  <span class="comment">//  System Programming Guide, Chatper 7: Multiple-processor management,</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>  <span class="comment">//  Section 7.2, Memory Ordering.</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span>  <span class="comment">// Last seen at:</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>  <span class="comment">//   http://developer.intel.com/design/pentium4/manuals/index_new.htm</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>  <span class="comment">//</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>  <span class="comment">// x86 stores/loads fail to act as barriers for a few instructions (clflush</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>  <span class="comment">// maskmovdqu maskmovq movntdq movnti movntpd movntps movntq) but these are</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span>  <span class="comment">// not generated by the compiler, and are rare.  Users of these instructions</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>  <span class="comment">// need to know about cache behaviour in any case since all of these involve</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>  <span class="comment">// either flushing cache lines or non-temporal cache hints.</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>}</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span> </div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a7d6c7a9cd36a3510088437fb28e998b8">NoBarrier_Load</a>(<span class="keyword">volatile</span> <span class="keyword">const</span> Atomic64* ptr) {</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>  <span class="keywordflow">return</span> *ptr;</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>}</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span> </div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#aa99064d25f3a571f757e33bd9e8214e5">Acquire_Load</a>(<span class="keyword">volatile</span> <span class="keyword">const</span> Atomic64* ptr) {</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>  Atomic64 value = *ptr; <span class="comment">// An x86 load acts as a acquire barrier,</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>                         <span class="comment">// for current AMD/Intel chips as of Jan 2008.</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>                         <span class="comment">// See also Release_Store(), above.</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>  <a class="code hl_define" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#aa3b12a493a95aee6ca06745c0c477145">ATOMICOPS_COMPILER_BARRIER</a>();</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>  <span class="keywordflow">return</span> value;</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>}</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span> </div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a0533289c3b0c65213bddb82211634aa9">Release_Load</a>(<span class="keyword">volatile</span> <span class="keyword">const</span> Atomic64* ptr) {</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>  <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">MemoryBarrier</a>();</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span>  <span class="keywordflow">return</span> *ptr;</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>}</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span> </div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a4cfa97b39c0c5690fcd1f646f035de3f">Acquire_CompareAndSwap</a>(<span class="keyword">volatile</span> Atomic64* ptr,</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>                                       Atomic64 old_value,</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>                                       Atomic64 new_value) {</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span>  Atomic64 x = <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">NoBarrier_CompareAndSwap</a>(ptr, old_value, new_value);</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#a8da6dd36e5712f8e1f1afd513fb11f3c">AtomicOps_Internalx86CPUFeatures</a>.<a class="code hl_variable" href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">has_amd_lock_mb_bug</a>) {</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>    __asm__ __volatile__(<span class="stringliteral">&quot;lfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>  }</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span>  <span class="keywordflow">return</span> x;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span>}</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span> </div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span><span class="keyword">inline</span> Atomic64 <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#ac09549f056f12b8d8528928f15b01e2d">Release_CompareAndSwap</a>(<span class="keyword">volatile</span> Atomic64* ptr,</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span>                                       Atomic64 old_value,</div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span>                                       Atomic64 new_value) {</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">NoBarrier_CompareAndSwap</a>(ptr, old_value, new_value);</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>}</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span> </div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span><span class="preprocessor">#endif  </span><span class="comment">// defined(__x86_64__)</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span> </div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span>} <span class="comment">// namespace base::subtle</span></div>
</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>} <span class="comment">// namespace base</span></div>
</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span> </div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span><span class="preprocessor">#undef ATOMICOPS_COMPILER_BARRIER</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span> </div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span><span class="preprocessor">#endif  </span><span class="comment">// CEF_INCLUDE_BASE_INTERNAL_CEF_ATOMICOPS_X86_GCC_H_</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span> </div>
<div class="ttc" id="acef__atomicops__x86__gcc_8h_html_a8da6dd36e5712f8e1f1afd513fb11f3c"><div class="ttname"><a href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#a8da6dd36e5712f8e1f1afd513fb11f3c">AtomicOps_Internalx86CPUFeatures</a></div><div class="ttdeci">struct AtomicOps_x86CPUFeatureStruct AtomicOps_Internalx86CPUFeatures</div></div>
<div class="ttc" id="acef__atomicops__x86__gcc_8h_html_aa3b12a493a95aee6ca06745c0c477145"><div class="ttname"><a href="../../d5/dc3/cef__atomicops__x86__gcc_8h.html#aa3b12a493a95aee6ca06745c0c477145">ATOMICOPS_COMPILER_BARRIER</a></div><div class="ttdeci">#define ATOMICOPS_COMPILER_BARRIER()</div><div class="ttdef"><b>定义</b> <a href="#l00048">cef_atomicops_x86_gcc.h:48</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a0533289c3b0c65213bddb82211634aa9"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a0533289c3b0c65213bddb82211634aa9">base::subtle::Release_Load</a></div><div class="ttdeci">Atomic32 Release_Load(volatile const Atomic32 *ptr)</div><div class="ttdef"><b>定义</b> <a href="#l00144">cef_atomicops_x86_gcc.h:144</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a10d52b3886a1b46cebf58355162f0a48"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a10d52b3886a1b46cebf58355162f0a48">base::subtle::Release_Store</a></div><div class="ttdeci">void Release_Store(volatile Atomic32 *ptr, Atomic32 value)</div><div class="ttdef"><b>定义</b> <a href="#l00127">cef_atomicops_x86_gcc.h:127</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a25f53fcd33acbae594f54a653679f676"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a25f53fcd33acbae594f54a653679f676">base::subtle::Barrier_AtomicIncrement</a></div><div class="ttdeci">Atomic32 Barrier_AtomicIncrement(volatile Atomic32 *ptr, Atomic32 increment)</div><div class="ttdef"><b>定义</b> <a href="#l00085">cef_atomicops_x86_gcc.h:85</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a2967f2c44db716a181861a2e09142e39"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a2967f2c44db716a181861a2e09142e39">base::subtle::NoBarrier_CompareAndSwap</a></div><div class="ttdeci">Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32 *ptr, Atomic32 old_value, Atomic32 new_value)</div><div class="ttdef"><b>定义</b> <a href="#l00055">cef_atomicops_x86_gcc.h:55</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a4cfa97b39c0c5690fcd1f646f035de3f"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a4cfa97b39c0c5690fcd1f646f035de3f">base::subtle::Acquire_CompareAndSwap</a></div><div class="ttdeci">Atomic32 Acquire_CompareAndSwap(volatile Atomic32 *ptr, Atomic32 old_value, Atomic32 new_value)</div><div class="ttdef"><b>定义</b> <a href="#l00098">cef_atomicops_x86_gcc.h:98</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a6defad5b43e489dd731ce1218caf064c"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a6defad5b43e489dd731ce1218caf064c">base::subtle::NoBarrier_AtomicExchange</a></div><div class="ttdeci">Atomic32 NoBarrier_AtomicExchange(volatile Atomic32 *ptr, Atomic32 new_value)</div><div class="ttdef"><b>定义</b> <a href="#l00066">cef_atomicops_x86_gcc.h:66</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a7d6c7a9cd36a3510088437fb28e998b8"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a7d6c7a9cd36a3510088437fb28e998b8">base::subtle::NoBarrier_Load</a></div><div class="ttdeci">Atomic32 NoBarrier_Load(volatile const Atomic32 *ptr)</div><div class="ttdef"><b>定义</b> <a href="#l00133">cef_atomicops_x86_gcc.h:133</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_a858cf021e800f3fc91408f3378247138"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#a858cf021e800f3fc91408f3378247138">base::subtle::NoBarrier_Store</a></div><div class="ttdeci">void NoBarrier_Store(volatile Atomic32 *ptr, Atomic32 value)</div><div class="ttdef"><b>定义</b> <a href="#l00114">cef_atomicops_x86_gcc.h:114</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_aa99064d25f3a571f757e33bd9e8214e5"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#aa99064d25f3a571f757e33bd9e8214e5">base::subtle::Acquire_Load</a></div><div class="ttdeci">Atomic32 Acquire_Load(volatile const Atomic32 *ptr)</div><div class="ttdef"><b>定义</b> <a href="#l00137">cef_atomicops_x86_gcc.h:137</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_aaf2dc7b463ca56cda3091037c3d68871"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#aaf2dc7b463ca56cda3091037c3d68871">base::subtle::NoBarrier_AtomicIncrement</a></div><div class="ttdeci">Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32 *ptr, Atomic32 increment)</div><div class="ttdef"><b>定义</b> <a href="#l00075">cef_atomicops_x86_gcc.h:75</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_ac09549f056f12b8d8528928f15b01e2d"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#ac09549f056f12b8d8528928f15b01e2d">base::subtle::Release_CompareAndSwap</a></div><div class="ttdeci">Atomic32 Release_CompareAndSwap(volatile Atomic32 *ptr, Atomic32 old_value, Atomic32 new_value)</div><div class="ttdef"><b>定义</b> <a href="#l00108">cef_atomicops_x86_gcc.h:108</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_ad160cbf5276199e83e430596a2cda70a"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#ad160cbf5276199e83e430596a2cda70a">base::subtle::Acquire_Store</a></div><div class="ttdeci">void Acquire_Store(volatile Atomic32 *ptr, Atomic32 value)</div><div class="ttdef"><b>定义</b> <a href="#l00122">cef_atomicops_x86_gcc.h:122</a></div></div>
<div class="ttc" id="anamespacebase_1_1subtle_html_adebb50dfd5a9fc6130762ab344b21372"><div class="ttname"><a href="../../dc/d42/namespacebase_1_1subtle.html#adebb50dfd5a9fc6130762ab344b21372">base::subtle::MemoryBarrier</a></div><div class="ttdeci">void MemoryBarrier()</div><div class="ttdef"><b>定义</b> <a href="#l00118">cef_atomicops_x86_gcc.h:118</a></div></div>
<div class="ttc" id="anamespacebase_html"><div class="ttname"><a href="../../d2/dc5/namespacebase.html">base</a></div><div class="ttdef"><b>定义</b> <a href="#l00050">cef_atomicops_x86_gcc.h:50</a></div></div>
<div class="ttc" id="astruct_atomic_ops__x86_c_p_u_feature_struct_html"><div class="ttname"><a href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html">AtomicOps_x86CPUFeatureStruct</a></div><div class="ttdef"><b>定义</b> <a href="#l00041">cef_atomicops_x86_gcc.h:41</a></div></div>
<div class="ttc" id="astruct_atomic_ops__x86_c_p_u_feature_struct_html_aea4e2ca03f58ed24ed50787d6d804004"><div class="ttname"><a href="../../d6/d73/struct_atomic_ops__x86_c_p_u_feature_struct.html#aea4e2ca03f58ed24ed50787d6d804004">AtomicOps_x86CPUFeatureStruct::has_amd_lock_mb_bug</a></div><div class="ttdeci">bool has_amd_lock_mb_bug</div><div class="ttdef"><b>定义</b> <a href="#l00042">cef_atomicops_x86_gcc.h:42</a></div></div>
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